legend for graphs

(duh, apparently I'm the only person who would have known what this
graph represents)

public/less/admin/admin.less

@@ -156,6 +156,38 @@
 
 	.graph-container {
 		padding-right: 50px;
+		position: relative;
+
+		.graph-legend {
+			.box-header-font;
+			display: block;
+			position: absolute;
+			top: 20px;
+			left: 35px;
+			list-style-type: none;
+			padding: 0;
+
+			li {			
+				div {
+					border: 1px solid;
+					width: 12px;
+					height: 12px;
+					vertical-align: -41%;
+    				margin-bottom: 5px;
+    				display: inline-block;
+					margin-right: 5px;
+
+					&.page-views {
+						border-color: rgba(220,220,220,1);
+						background-color: rgba(220,220,220,0.2);
+					}
+					&.unique-visitors {
+						border-color: rgba(151,187,205,1);
+						background-color: rgba(151,187,205,0.2);
+					}
+				}
+			}
+		}
 	}
 
 	.version-check {

src/views/admin/index.tpl

@@ -4,6 +4,10 @@
 			<div class="panel-heading">Forum Traffic</div>
 			<div class="panel-body">
 				<div class="graph-container">
+					<ul class="graph-legend">
+						<li><div class="page-views"></div><span>Page Views</span></li>
+						<li><div class="unique-visitors"></div><span>Unique Visitors</span></li>
+					</ul>
 					<canvas id="analytics-traffic" width="100%" height="400"></canvas>
 				</div>
 			</div>